* {margin:0;padding:0;}

body {
	background:#FFFFFA;
}

.contenido {
	width:500px;
	margin:20px auto;
	text-align: justify;
}

h1, h2, h3, h4, h5 ,h6 {
	color:#81b8d7;
}

.contenido p {
	margin-bottom:1em;
}

.ir-arriba {
	padding:20px;
	display:inline-block;
	color:#fff;
	position: fixed;
	font-size:20px;
	bottom:20px;
	right:20px;
	display:none;
	cursor:pointer;
    background-image: url("image/arriba.png");
    width: 80px;
    height: 80px;
}